Need Help Identifying Parts on a crossover and a few other newbie questions

[UL161]

Hi I am trying to refurbish this crossover with some higher quality poly-caps/parts... The speaker is a in-wall Polk 65-RT... Key questions I have are:

1) What in the world is the yellow part on the board (label is MET 1.0J 100V)?... Should I even consider replacing it?
2) The 470uF cap.... Does anyone know have a suggestion as to where I can find a reasonable audio quality polycap near that value? (or at least 3 160s or the like?) { I don't want to spend $70 just to replace this one if I can) (maybe even someone looking at this circuit could even tell if this cap is important if I am just running the speaker with standard settings on the toggle switches? (i think 1 toggle messes with the tweeter power and the other with the woofer)
3) For the resistor 5W4R5J, does this mean a 5w 4Ohm resistor or 5w 4.5Ohm resistor??


Any help you can provide would be appreciated!!

[stj]

it's a film capacitor - probably 1uf
and it will be fine.
good luck finding decent bi-polar electrolytics anymore though.

[UL161]

Any ideas on my other questions?

[check12]

Hi I am trying to refurbish this crossover with some higher quality poly-caps/parts... The speaker is a in-wall Polk 65-RT... Key questions I have are:

1) What in the world is the yellow part on the board (label is MET 1.0J 100V)?... Should I even consider replacing it?
2) The 470uF cap.... Does anyone know have a suggestion as to where I can find a reasonable audio quality polycap near that value? (or at least 3 160s or the like?) { I don't want to spend $70 just to replace this one if I can) (maybe even someone looking at this circuit could even tell if this cap is important if I am just running the speaker with standard settings on the toggle switches? (i think 1 toggle messes with the tweeter power and the other with the woofer)
3) For the resistor 5W4R5J, does this mean a 5w 4Ohm resistor or 5w 4.5Ohm resistor??


Any help you can provide would be appreciated!!

2) Audio capacitors are marketing BS 🤡🤡🤡, don't waste your money!, if they are faulty then any good named brand e.g. Panasonic, Nichicon etc. cap of the same value are as good as you will get.

3) It means 5W 4.5 ohms ... J is tolerance (+ or - 5%)

Honestly though don't waste money on "Audio" caps ....

[stj]

is something supposed to be wrong with it or are you just trying to make it better?

[UL161]

Trying to improve the performance of the speakers by improving the quality of the crossover components

[stj]

dont bother, the only thing a crossover is really for is to block bass from reaching moving coil tweeters.
piezo ones dont even need a crossover and bass speakers just ignore higher frequencies.